﻿<%@ webhandler Language="C#" class="Upload" %>

/**
 * KindEditor ASP.NET
 *
 * 本ASP.NET程序是演示程序，建议不要直接在实际项目中使用。
 * 如果您确定直接使用本程序，使用之前请仔细确认相关安全设置。
 *
 */

using System;
using System.Collections;
using System.Web;
using System.IO;
using System.Globalization;
using LitJson;
using System.Configuration;

public class Upload : IHttpHandler
{
    private HttpContext context;

    public void ProcessRequest(HttpContext context)
    {
        String aspxUrl = context.Request.Path.Substring(0, context.Request.Path.LastIndexOf("/") + 1);
        String DishesPic = ConfigurationManager.AppSettings["Order_Upload_Photos"];
        String DishesPics = ConfigurationManager.AppSettings["WeChat_Upload_Photos"];

        String[] stringArray = new String[] { DishesPic, DishesPics };
        Hashtable hash = null;
        String fileUrl = "";
        String FileNameDateTime = DateTime.Now.ToString("yyyyMMddHHmmssfff");
        foreach (var item in stringArray)
        {
            //文件保存目录路径
            //String savePath = "../attached/";
            String savePath = item + "/";

            //文件保存目录URL
            //String saveUrl = aspxUrl + "../attached/";
            String saveUrl = item + "/";

            //定义允许上传的文件扩展名
            Hashtable extTable = new Hashtable();
            extTable.Add("image", "gif,jpg,jpeg,png,bmp");
            extTable.Add("flash", "swf,flv");
            extTable.Add("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
            extTable.Add("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

            //最大文件大小
            int maxSize = 1000000;
            this.context = context;

            HttpPostedFile imgFile = context.Request.Files["imgFile"];
            if (imgFile == null)
            {
                showError("请选择文件。");
            }

            //String dirPath = context.Server.MapPath(savePath);
            String dirPath = savePath;
            if (!Directory.Exists(dirPath))
            {
                Directory.CreateDirectory(dirPath);
                //showError("上传目录不存在。");
            }

            String dirName = context.Request.QueryString["dir"];
            if (String.IsNullOrEmpty(dirName))
            {
                dirName = "image";
            }
            if (!extTable.ContainsKey(dirName))
            {
                showError("目录名不正确。");
            }

            String fileName = imgFile.FileName;
            String fileExt = Path.GetExtension(fileName).ToLower();

            if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
            {
                showError("上传文件大小超过限制。");
            }

            if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)
            {
                showError("上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。");
            }

            //创建文件夹
            dirPath += dirName + "/";
            saveUrl += dirName + "/";
            if (!Directory.Exists(dirPath))
            {
                Directory.CreateDirectory(dirPath);
            }
            String ymd = DateTime.Now.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
            dirPath += ymd + "/";
            saveUrl += ymd + "/";
            if (!Directory.Exists(dirPath))
            {
                Directory.CreateDirectory(dirPath);
            }

            //String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
            String newFileName = FileNameDateTime + fileExt;
            String filePath = dirPath + newFileName;
            imgFile.SaveAs(filePath);
            fileUrl = saveUrl + newFileName;
            hash = new Hashtable();
            hash["error"] = 0;
            //hash["url"] = fileUrl;
            hash["url"] = "/Attached" + fileUrl.Replace(item, "");
        }
        context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
        context.Response.Write(JsonMapper.ToJson(hash));
        context.Response.End();
    }

    private void showError(string message)
    {
        Hashtable hash = new Hashtable();
        hash["error"] = 1;
        hash["message"] = message;
        context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
        context.Response.Write(JsonMapper.ToJson(hash));
        context.Response.End();
    }

    public bool IsReusable
    {
        get
        {
            return true;
        }
    }
}
